fix: address Greptile review feedback

- Clean up aliases key from entries with empty aliases list
- Strengthen test assertion for alias conflict warning

litellm/litellm_core_utils/get_model_cost_map.py

@@ -199,9 +199,11 @@ def _expand_model_aliases(model_cost: dict) -> dict:
 
     for model_name, model_info in model_cost.items():
         aliases: Optional[list] = model_info.get("aliases")
-        if not aliases:
+        if aliases is None:
             continue
         keys_with_aliases.append(model_name)
+        if not aliases:
+            continue
         for alias in aliases:
             if alias in model_cost:
                 verbose_logger.warning(

tests/test_litellm/test_model_cost_aliases.py

@@ -148,7 +148,7 @@ class TestAliasConflicts:
 
         # The canonical "model-dated" entry is preserved, not overwritten
         assert "model-dated" in result
-        assert "alias conflict" in caplog.text.lower() or len(result) == 2
+        assert "alias conflict" in caplog.text.lower()
 
     def test_duplicate_alias_across_entries(self, caplog):
         """Same alias claimed by two different entries: second one is skipped."""